Atopy is a predisposition toward developing certain allergic hypersensitivity reactions. Atopy may have a hereditary component, although contact with the allergen or irritant must occur before the hypersensitivity reaction can develop.
As of 2012, 63.9 percent of players playing in Major League Baseball are white. There is no way of telling the exact number due to the number of players.
Major League Baseball players. Amongst all teams in Major League Baseball, the Boston Red Sox have the roster with the highest average player age in 2014. The average age of the Boston Red Sox players in April 2014 was 31 years. The oldest player in the MLB as at April 17, 2014 is Raul Ibanez.